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5.00 out of 5 based on 1 customer rating
Based on 1 customer review

Specification Sheets

Spec Sheet

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Product Description

Honda V-twin engines offer higher horsepower, improved adaptability, quiet operation, and greater fuel efficency, not to mention a 3 year warranty.

Common Applications

  • Pressure washers
  • Commercial lawn and garden equipment
  • Tillers / cultivators
  • Generators
  • Forestry equipment
  • Construction / industrial equipment
  • Agricultural equipment
  • Small vehicles
  • Water pumps

Fuel Efficient Operation

  • Fuel economy is similar to fuel injection, with the simplicity of carburetion
  • Digital CDI ignition system with variable timing
  • Includes a rev limiter to protect against damage from over-revving
  • Two barrel inner-vent carburetor for more precise fuel metering
  • Insert style rod bearings

High Output Performance

  • Hemispherical combustion chamber delivers rapid combustion
  • 9.3:1 compression ratio generates high power output without the need for premium fuel
  • Forged steel crankshaft
  • Pressure fed crankshaft bearings

Smooth Performance

  • Integrated cylinder and head
  • Racing inspired forged steel connecting rods

Exceptionally Quiet

  • High capacity 36 blade cooling fan
  • Aluminum push rods with steel tips – lighter weight, lower vibration, and quieter operation

Prove Reliability

  • High capacity pump facilitates consistent oil delivery
  • Dual cylindrical air filter
  • Large diameter air intake for superior cooling
  • 3-year limited warranty
  • Oil alert

Easy to Use and Maintain

  • Hour meter available
  • Conveniently located controls, with several configurations available based on user preference
  • Automotive-type spin-on oil filter

Easy Starting

  • Automatic mechanical de-compression system
  • Variable ignition timing

Emissions Compliant

  • CARB and EPA certified
  • No catalyst necessary

Available Options

  • High capacity charging systems
  • A variety of control box configurations
  • Hour meter
  • Dry fuel versions

Price quoted includes GST.

* Contact Genelite on 1300 305 912 for best price. Quantity and regional discounts may apply.

Engine Type Air-cooled 4-stroke OHV
Bore x Stroke 78 X 72 mm
Displacement 688 cm3
Net Power Output* 20.8 hp (15.5 kW) @ 3,600 rpm
Net Torque 35.6 lbs ft (48.3 Nm) @ 2,500 rpm
PTO Shaft Rotation Counter-clockwise (from PTO shaft side)
Compression Ratio 9.3:1
Lamp/Charge coil options 2.7A, 17A, 26A
Carburetor Horizontal type, two barrel butterfly valve, internal vent
Ignition System Digital CDI with variable ignition timing
Starting System Electric
Lubrication System Forced lubrication
Governor System Mechanical
Air cleaner Dual element
Oil Capacity 2.1 US qt (1.9)
Fuel Unleaded 86 Octane or higher
Dry Weight 96.8 lb (44.4 kg)


Length (min) 15.9″ (405 mm)
Width (min) 16.1″ (410 mm)
Height (min) 17.2″ (438 mm)

PTO Shaft Options

V type Tapered shaft
T type Straight shaft
B type Straight shaft
S type Straight shaft (metric)
D type Straight shaft

1 review for GX630

  1. 5 out of 5


    The GX630 engine is suitable for construction equipment, generators and other professional heavy-duty applications.
    Engine features:

    The OHV design enhances combustion efficiency
    Variable ignition timing (digital CDI) results in high power output, reduced fuel consumption and excellent exhaust emission performance
    The high-efficiency cooling fan generates higher airflow with reduced noise levels
    High quality materials and purpose-built components ensure reliable, long-term use
    Meets world’s most stringent environmental legislation
    Low fuel and oil consumption

    Fantastic, quality Honda product!

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